Keyboard



FIG. 1 is a rear perspective view of a keyboard showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top elevational view thereof;

FIG. 5 is a bottom elevational view thereof;

FIG. 6 is a left elevational view thereof; and,

FIG. 7 is a right elevational view thereof.

The broken lines in the drawings depict portions of the keyboard thatform no part of the claimed design.

CLAIM The ornamental design for a keyboard, as shown and described.